 /*******************************************************************************
  * Copyright (c) 2002, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.cheatsheets.views;

 public class StringDelimitedTokenizer {

     private String str;
     private String delimiter;
     private int delimiterLength;
     private int currentPosition;
     private int maxPosition;

     public StringDelimitedTokenizer(String str, String delim) {
         currentPosition = 0;
         this.str = str;
         this.delimiter = delim;
         maxPosition = this.str.length();
         delimiterLength = this.delimiter.length();
     }

     public int countTokens() {
         int count = 0;
         int startPosition = 0;

         while (startPosition < maxPosition && startPosition != -1) {
             startPosition = str.indexOf(delimiter, startPosition);
             if (startPosition != -1) {
                 startPosition += delimiterLength;
             }
             count++;
         }

         return count;
     }

     public boolean endsWithDelimiter() {
         return str.endsWith(delimiter);
     }

     public boolean hasMoreTokens() {
         return (currentPosition < maxPosition);
     }

     public String nextToken() {
         int position = str.indexOf(delimiter, currentPosition);
         String token = null;
         if (position == -1) {
             token = str.substring(currentPosition);
             currentPosition = maxPosition;
         } else {
             token = str.substring(currentPosition, position);
             currentPosition = position + delimiterLength;
         }
         return token;
     }
 }

